Hello,after I didn't get any feedback, I installed a virtual machine with macOS 10.13.1 High Sierra.Afterwards I was able to install and start Zend Server and Zend Studio without any problems.Debugging also works, Z-Ray runs without problems.I have tested what I need for my work.Is there a reason why you (Zend) didn't release macOS 10.13., are there any objections to using it?